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US 4,416,350 AGranted
Muffler
AssigneeNissan Motor Co., Ltd.
InventorYoshimasa Hayashi
Life of this patent
Estimating the term…
Abstract
The expansion chamber shell into which the gas from a noise source, such as an internal combustion engine, is rushed is held in an outer shell in a manner to define therebetween a clearance which acts as a sound damping means against the gas passing through the muffler. Thus, the noise caused by the inevitable vibration of the expansion chamber shell is prevented from being directly transmitted to the outside of the muffler.
Claims6
A muffler comprising:
- an inner shell having therein an expansion chamber;
- an outer shell covering said inner shell to define a clearance therebetween, said inner shell being fixed to said outer shell to define a continuous line of contact therebetween thereby to divide the clearance into first and second cavity sections;
- means connecting said expansion chamber to said first cavity section thereby allowing said first cavity section to show a sound damping effect;
- an inlet pipe leading to said expansion chamber thereby introducing thereinto a gas issued from a noise source;
- an outlet pipe extending from said first cavity section to the open air thereby discharging the gas, fed to the first cavity section through said means, into the open air.
2 more elements
Dependencies are inferred from the claim text.